____ is a measurement of the electromotive force produced by a source.

The opposition to the flow of electrons through a circuit is called ____.

All matter is made up of tiny particles called ____.

Electrons may be free to travel ____.

The electrons in conductive materials ____.

Silver, copper, and aluminum are examples of materials that ____.

Substances that resist electron flow are ____.

The electron-pushing force in a conductor is called ____.

A(n) ____ is the potential difference between two points in an electric current when the energy needed to move one ampere between the points is one joule.

In formulas, voltage is represented by either ____.

Resistance is measured in ____

Resistance equals ____.

The process by which electrical energy changes into mechanical energy is ____.

A series circuit has only one ____.

Alternating current has current constantly changing direction and voltage continuously changing value and polarity.

Most circuits contain components that cause the voltage and current to be in phase with each other.

The opposition due to inductance is called inductive capacitance.

Inductance is measured in units called Henrys.

Capacitance is the condition whereby a circuit stores electrical energy.

If a source of direct current is connected to the two plates of a capacitor, the current will flow initially, but gradually decrease to zero.

If a source of direct current is connected to the two plates of a capacitor, the current will flow initially, but gradually decrease to zero.

The power factor is the ratio of true power to the voltage.

Multiplying voltage and current equals apparent power.

Apparent power is determined by measuring the voltage with a voltmeter, the current with an ammeter, and then multiplying the actual readings.

Impedance is determined with a wattmeter.

Phase is represented by the Greek letter Theta.

Nominal voltage indicates a desired level of the supply voltage for the electrical system.

Rated voltage is the preferred voltage for equipment.